/*
 * Copyright (C) 2009 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.apis.app;

// Need the following import to get access to the app resources, since this
// class is in a sub-package.
import com.example.android.apis.R;

import java.io.IOException;

import android.app.Activity;
import android.app.WallpaperManager;
import android.graphics.Color;
import android.graphics.PorterDuff;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;

/**
 * <h3>SetWallpaper Activity</h3>
 * 
 * <p>
 * This demonstrates the how to write an activity that gets the current system
 * wallpaper, modifies it and sets the modified bitmap as system wallpaper.
 * </p>
 */
public class SetWallpaperActivity extends Activity {
	final static private int[] mColors = { Color.BLUE, Color.GREEN, Color.RED,
			Color.LTGRAY, Color.MAGENTA, Color.CYAN, Color.YELLOW, Color.WHITE };

	/**
	 * Initialization of the Activity after it is first created. Must at least
	 * call {@link android.app.Activity#setContentView setContentView()} to
	 * describe what is to be displayed in the screen.
	 */
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// Be sure to call the super class.
		super.onCreate(savedInstanceState);
		// See res/layout/wallpaper_2.xml for this
		// view layout definition, which is being set here as
		// the content of our screen.
		setContentView(R.layout.wallpaper_2);
		final WallpaperManager wallpaperManager = WallpaperManager
				.getInstance(this);
		final Drawable wallpaperDrawable = wallpaperManager.getDrawable();
		final ImageView imageView = (ImageView) findViewById(R.id.imageview);
		imageView.setDrawingCacheEnabled(true);
		imageView.setImageDrawable(wallpaperDrawable);

		Button randomize = (Button) findViewById(R.id.randomize);
		randomize.setOnClickListener(new OnClickListener() {
			public void onClick(View view) {
				int mColor = (int) Math.floor(Math.random() * mColors.length);
				wallpaperDrawable.setColorFilter(mColors[mColor],
						PorterDuff.Mode.MULTIPLY);
				imageView.setImageDrawable(wallpaperDrawable);
				imageView.invalidate();
			}
		});

		Button setWallpaper = (Button) findViewById(R.id.setwallpaper);
		setWallpaper.setOnClickListener(new OnClickListener() {
			public void onClick(View view) {
				try {
					wallpaperManager.setBitmap(imageView.getDrawingCache());
					finish();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		});
	}
}
